Pretty late, but my 2 bits ...
Dwivedi Ajay kumar wrote:
> The compression techniques are usually general and the percentage
> compression depends on the content and generally the length of the file.
> Take an example.
> The stats for html files in my /home/httpd/html/manual/mod/mod_php3
> file usage(blocks) Size
> *.* 4885 100%
> gzip *.* 1965 40.2%
> gunzip *.*
> tar *.* >/tmp/a.tar 5158 105.5%
> gzip a.tar 609 12.5%
>
> Your html files must be real small and hence any general
> compression algoritm will not compress your files greatly. The only way is
> to tar -zc them.
tar is basically an archiving program, it actually increases the size of
the file, b'cos it puts header info about the archive in the tar file.
the reason that tar followed by a compression achieves better results
than a set of compressed files tarred together is that in the former
case the compression algo. is better able to make use of the redundancy
amongst the various files in thae archive.
regards,
sachin
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